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Tunable Bragg grating based on MOEMS technology

机译：基于MOEMS技术的可调式布拉格光栅

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摘要

Tunable wavelength selective and band pass filters are widely used nowadays in transmission technology and light processing, with setups based on Acustooptic modulators, Fabry Perrot filters, Mach Zehnder and Sagnac interferometers and fiber Bragg gratings (FBGs) with electro-optical, mechanical or thermal tuning mechanism. Multilayer structures like FBGs are used in the design of e.g. broad-band terminations of transmission lines, narrow-band transmission filters for wavelength-division multiplexing (WDM) and in other fiber optics systems for signal processing. One of the biggest advantages of dielectric mirrors is that they are characterized with very small losses, as compared with normal metallic mirrors. Apart from that, with the use of Bragg mirrors one can control bandwidth of the reflected light beam, as well as the angles for which the reflection is obtained. This opens up a possibility of building setups sensitive to such parameters as the lighting angle and the wavelength. Additionally, Bragg mirrors can be used for a wide spectrum of the electromagnetic waves from UV to FIR. In this paper we propose a new concept of MOEMS-based free-space tunable Bragg grating as a wavelength selective and band pass filter. The use of MEMS allows obtaining fast and reliable tuning with respect to other methods.
机译：可调波长选择滤光片和带通滤光片如今在传输技术和光处理中得到广泛使用，其设置基于声光调制器，Fabry Perrot滤光片，Mach Zehnder和Sagnac干涉仪以及具有电光，机械或热调谐功能的光纤布拉格光栅（FBG）机制。诸如FBG之类的多层结构可用于例如传输线的宽带终端，用于波分复用（WDM）的窄带传输滤波器以及其他用于信号处理的光纤系统。电介质镜的最大优点之一是，与普通金属镜相比，它们的损耗很小。除此之外，通过使用布拉格反射镜，可以控制反射光束的带宽以及获得反射的角度。这开辟了对诸如照明角度和波长之类的参数敏感的建筑物设置的可能性。另外，布拉格反射镜可用于从UV到FIR的宽范围电磁波。在本文中，我们提出了一种基于MOEMS的自由空间可调布拉格光栅的新概念，作为波长选择和带通滤波器。 MEMS的使用允许相对于其他方法获得快速且可靠的调谐。

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